Sand blast machine



(No Model.) 2 SheetS -Sheet 1.

H. RNEHRQ SAND BLAST MACHINE.

No. 469,642. Patents 892.

Zl/Lf'lvesses. Ira/endow (No Model.) ,2 ShetsQSheet 2'.

H. P. NEHR.

SAND BLAST MACHINE. No. 469,642. Patented Feb. 23, 1892.

ZUZZMSSS-S. 176067045074 UNITED STATES PATENT OFFICE. I

HERMAN F. NEHR, OF BALLARD VALE, MASSACHUSETTS, ASSIGNOR TO THE CRAIGHEAD & KINTZ COMPANY, OF SAME PLACE.

SAN D-BLAST MACHINE.

SPECIFICATION forming part of Letters Patent No. 469,642, dated February 23, 1892.

Application filed April 28, 1891. Serial No. 390,872. (No model.)

To all whom it may concern:

Be it known that I, HERMAN F. NEHR, a resident of Ballard Vale, county of Essex, State of Massachusetts, have invented an Improvement in Sand-Blast Machines, of which the following description, in connection with the accompanying drawings, is a specification,

- like letters on the drawings representing like parts.

This invention has for its object the production of a novel sand-blast machine which may be used among other purposes for cleaning castings and the like.

In accordance with this invention the sand is taken from a suitable receptacle by an automatic carrier or feeder, which conveys and delivers the sand to a distributer which throws the sand in suitable manner upon the article or articles to be treated. or cleaned.

The distributor in the present embodiment of this invention consists of a series of wings or fans, preferably corrugated and radially arranged about a revolving shaft, the sand being delivered by the carrier to the revolving wings which catch and distribute the sand in proper manner upon the articles -to be treated.

The distributor is inclos'ed in a suitable case cushioned upon its inner walls to prevent noise, supports formed of wire-netting being provided within the case, upon which the articles to be treated may be suspended. A suction apparatus is provided to draw off the dust from the case.

Figure 1 represents in vertical section a sand-blast machine embodying this invention; and Fig. 2 a section of the same, taken on the dotted line x to, Fig. 1.

Referring to the drawings, the receptacle or hopper A, supported in a suitable frame A, is provided with an inwardly-inclined flange or partial cover A which supports the case B, preferably octagonal in shape and provided with doors B, the said casing and doors having, preferably, a lining b of rubber or other soft material. A tripod or other suitable stand 0 is supported on the top B of the easing 13, the said tripod having an annular ringlike bearing or support for the pulley a, fast on the upper end of and supporting the vertical tubular shaft a, provided at its lower end with a conical flange or, to which is secured the upper conical head a having fast to it the radially-arranged wings or fans a constituting the distributer A the wings being represented as formed with diverging corrugations to better distribute the sand when the shaft is revolved. The lower ends of the wings or fans a are united by the lower conical head a which turns about and has a bearing on the upper end of the fixed tube or conduit 0, supported with its lower open end a short distance above the bottom of the hopper A by a suitable frame-work c. The ver tical shaft d has formed upon it a spiral vane or carrier d and is supported Within the tube 0 by the belt-pulley d fast to its upper end, and by which said shaft may be rotated in the direction indicated by the arrow to take sand placed in the hopper and carry it up within the tube 0 and deliver it to the winged distributer A The sides of the octagonal inclosing case B and the doors B. are fitted with suitable supports I), from which'are suspended pieces of wire-netting b at some distance from the inner cushioned wall of the case and to which various rough castings or other articles may be hung for the purpose of being cleaned by the sand blast, as will be described.

Sand being placed in the hopper A through the doors B in the casing is carried or fed gradually and continuously upward by the rotating spiral carrier d to and within the rapidly-revolvin g wings of the distributor A the centrifugal action of which takes the sand from the carrier and throws it violently against the articles hung upon the netting b the particles of sand thus thrown acting to clean the castings and leave them free from foreign substances. The sand being hurled violently in all directions within the inclosing case B may be again utilized for the process of cleaning by placing additional articles upon the annular wire table 12 supported by chains or other supports 12 within the hopper A. (See Fig.1.) The sand delivered by the distributer is either thrown or drops again into the hopper to be used over again, the fine dust and other light particles being drawn off by a suction-fan F, which may be driven by a belt from a pulley fast on the upper end of the shaft (1, as shown. A slide or door A is placed in the bottom of the hopper A,tl1rough which the sand in the hopper may be drawn ofi when desired The distributer may be rotated in a direc tion opposite that of the carrier d or in the same direction, as desired, in order to secure the best results for the various classes of work.

The machine herein shown is very eflicient and is adapted to a wide range of work, for the sand thrown against the sides of the easing is returned against the back sides of the articles hung upon the netting, which does not interfere with the passage of sand through it.

The relative speeds of the carrier and distributer may be regulated for theproper delivery of sand to the distributer.

This invention is not limited to the particulararrangement and construction shown.

I claim 1. In a sand-blast machine, a receptacle for the sand and a revolving distributer, combined with a carrier to continuously feed to the distributer about its axis the sand contained in the receptacle, substantially as described.

52. In a sand-blast machine,a receptacle for the sand and a distributer, combined with a continuously-revolving spiral carrier to convey to the distributer the sand contained in the receptacle, substantially as described.

3. In a sand-blast machine, the combination, with a revolving distributer consisting of a series of radially-arranged wings, of a receptacle for sand and a continuously-operating carrier to convey sand contained in the receptacle to the said distributer about its axis, substantially as described.

4. In a sand-blast machine, a receptacle for the sand, and a distributer A, having corrugated wings a, combined with the spiral carrier d, to operate substantially as described.

5. In a sand-blast machine, a receptacle for the sand. a revolving distributer, and a contin uousl y-movin g carrier to convey sand from said receptacle to said distributer, combined with an inclosing case and a support conslsting of wire-netting on which to hang artlcles to be treated, substantially as described.

6. The hopper-A, inclosing case B, and netting b combined with the carrier d and distributer A all to operate substantially as described.

7. The hopper A, inclosing case B, netting b and shelf b combined with the carrier (1 and distributer A all to operate substan' tially as described. I

8. In a sand-blast machine, a receptacle for the sand, a revolving distributer, and a c011- tin uously-moving carrier to convey sand from said receptacle to said distributer, combined with an inclosingcase and a support consisting of wire-netting on which to hang articles to be treated, and the suction F, to operate substantially as described.

9. In a sand-blast machine, the hopper A, inclosing case B, having a cushion b and netting b combined with the stationary tube 0, the hollow shaft a, and distributer A", and the shaft (1 and spiral carrier d, all to operate substantially as described.

In tes imony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' HERMAN F. NEI-IR.

Witnesses:

G120. II. PooR, HENRY ISLER. 

